Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_BINFMTS_H
2#define _LINUX_BINFMTS_H
3
4#include <linux/sched.h>
5#include <linux/unistd.h>
6#include <asm/exec.h>
7#include <uapi/linux/binfmts.h>
8
9#define CORENAME_MAX_SIZE 128
10
11/*
12 * This structure is used to hold the arguments that are used when loading binaries.
13 */
14struct linux_binprm {
15 char buf[BINPRM_BUF_SIZE];
16#ifdef CONFIG_MMU
17 struct vm_area_struct *vma;
18 unsigned long vma_pages;
19#else
20# define MAX_ARG_PAGES 32
21 struct page *page[MAX_ARG_PAGES];
22#endif
23 struct mm_struct *mm;
24 unsigned long p; /* current top of mem */
25 unsigned int
26 cred_prepared:1,/* true if creds already prepared (multiple
27 * preps happen for interpreters) */
28 cap_effective:1;/* true if has elevated effective capabilities,
29 * false if not; except for init which inherits
30 * its parent's caps anyway */
31#ifdef __alpha__
32 unsigned int taso:1;
33#endif
34 unsigned int recursion_depth; /* only for search_binary_handler() */
35 struct file * file;
36 struct cred *cred; /* new credentials */
37 int unsafe; /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
38 unsigned int per_clear; /* bits to clear in current->personality */
39 int argc, envc;
40 const char * filename; /* Name of binary as seen by procps */
41 const char * interp; /* Name of the binary really executed. Most
42 of the time same as filename, but could be
43 different for binfmt_{misc,script} */
44 unsigned interp_flags;
45 unsigned interp_data;
46 unsigned long loader, exec;
47 char tcomm[TASK_COMM_LEN];
48};
49
50#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
51#define BINPRM_FLAGS_ENFORCE_NONDUMP (1 << BINPRM_FLAGS_ENFORCE_NONDUMP_BIT)
52
53/* fd of the binary should be passed to the interpreter */
54#define BINPRM_FLAGS_EXECFD_BIT 1
55#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
56
57/* Function parameter for binfmt->coredump */
58struct coredump_params {
59 const siginfo_t *siginfo;
60 struct pt_regs *regs;
61 struct file *file;
62 unsigned long limit;
63 unsigned long mm_flags;
64 loff_t written;
65};
66
67/*
68 * This structure defines the functions that are used to load the binary formats that
69 * linux accepts.
70 */
71struct linux_binfmt {
72 struct list_head lh;
73 struct module *module;
74 int (*load_binary)(struct linux_binprm *);
75 int (*load_shlib)(struct file *);
76 int (*core_dump)(struct coredump_params *cprm);
77 unsigned long min_coredump; /* minimal dump size */
78};
79
80extern void __register_binfmt(struct linux_binfmt *fmt, int insert);
81
82/* Registration of default binfmt handlers */
83static inline void register_binfmt(struct linux_binfmt *fmt)
84{
85 __register_binfmt(fmt, 0);
86}
87/* Same as above, but adds a new binfmt at the top of the list */
88static inline void insert_binfmt(struct linux_binfmt *fmt)
89{
90 __register_binfmt(fmt, 1);
91}
92
93extern void unregister_binfmt(struct linux_binfmt *);
94
95extern int prepare_binprm(struct linux_binprm *);
96extern int __must_check remove_arg_zero(struct linux_binprm *);
97extern int search_binary_handler(struct linux_binprm *);
98extern int flush_old_exec(struct linux_binprm * bprm);
99extern void setup_new_exec(struct linux_binprm * bprm);
100extern void would_dump(struct linux_binprm *, struct file *);
101
102extern int suid_dumpable;
103
104/* Stack area protections */
105#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */
106#define EXSTACK_DISABLE_X 1 /* Disable executable stacks */
107#define EXSTACK_ENABLE_X 2 /* Enable executable stacks */
108
109extern int setup_arg_pages(struct linux_binprm * bprm,
110 unsigned long stack_top,
111 int executable_stack);
112extern int bprm_change_interp(char *interp, struct linux_binprm *bprm);
113extern int copy_strings_kernel(int argc, const char *const *argv,
114 struct linux_binprm *bprm);
115extern int prepare_bprm_creds(struct linux_binprm *bprm);
116extern void install_exec_creds(struct linux_binprm *bprm);
117extern void set_binfmt(struct linux_binfmt *new);
118extern void free_bprm(struct linux_binprm *);
119extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
120
121#endif /* _LINUX_BINFMTS_H */